Catching SIGINT or Ctl C
suggest changeThe trap is reset for subshells, so the sleep
will still act on the SIGINT
signal sent by ^C
(usually by quitting), but the parent process (i.e. the shell script) won’t.
#!/bin/sh # Run a command on signal 2 (SIGINT, which is what ^C sends) sigint() { echo "Killed subshell!" } trap sigint INT # Or use the no-op command for no output #trap : INT # This will be killed on the first ^C echo "Sleeping..." sleep 500 echo "Sleeping..." sleep 500
And a variant which still allows you to quit the main program by pressing ^C
twice in a second:
last=0 allow_quit() { [ $(date +%s) -lt $(( $last + 1 )) ] && exit echo "Press ^C twice in a row to quit" last=$(date +%s) } trap allow_quit INT
Found a mistake? Have a question or improvement idea?
Let me know.
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